Hello,
This is WooPress theme documentation https://themeforest.net/item/woopress-responsive-ecommerce-wordpress-theme/9751050?s_rank=3
You are using XStore theme https://themeforest.net/item/xstore-responsive-woocommerce-theme/15780546
Here is XStore theme documentation https://xstore.helpscoutdocs.com/category/15-menu-set-up
Here you can find video tutorials https://www.youtube.com/playlist?list=PLMqMSqDgPNmCCyem_z9l2ZJ1owQUaFCE3
Regards